Title :
A 19 level dodecagonal voltage space vector structure for medium voltage IM drive
Author :
Kaarthik, R. Sudharshan ; Gopakumar, K. ; Cecati, Carlo ; Nagy, Istvan
Author_Institution :
Dept. of Electron. Syst. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
In this paper, a nineteen level dodecagonal voltage space vector structure is proposed for the first time, by cascading two asymmetric three level inverters with isolated H-Bridges. The dodecagonal structure is made possible by proper selection of DC link voltages and switching states of the inverters. The proposed scheme retains all the advantages of multilevel topologies as well the advantages of dodecagonal voltage space vector structure. A generic and simple method for calculation of PWM timings is proposed. Also, a new method of switching technique is proposed, which ensures minimum switching while maintaining the linearity between modulating signals and the output phase voltages. Extensive simulation and experimental results have been presented for validation of the proposed concept.
Keywords :
bridge circuits; cascade networks; induction motor drives; invertors; pulse width modulation; switching convertors; DC link voltage; PWM timing; cascading network; induction motor drive; inverter switching state; isolated H-bridge; medium voltage IM drive; modulating signal; multilevel topology; nineteen level dodecagonal voltage space vector structure; phase voltage; pulse width modulation timing; switching technique; Capacitors; Induction motors; Inverters; Redundancy; Switches; Topology; Vectors; Cascaded H-Bridge; Dodecagonal Voltage Space Vector Structure; Induction Motor Drive; Multilevel Inverters; Neutral Point Clamped; Pulse Width Modulation;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048622
